"Developing in one part of the city can change the flood risk in another part of the city because of these drainage networks. All parts of cities are interconnected," explained Dr. Ali Mostafavi, a professor of Civil Engineering, Texas A&M University. "The drainage capacity is always behind the development."

Matthew Angel Tufono had just celebrated his 51st birthday with loved ones. Hours later on his way to work, he became trapped in the chaos of rushing floodwaters.

This week in South Texas is expected to be much drier as a ridge of high atmospheric pressure moves into West Texas for a day or two.

SAN ANTONIO - A Flash Flood Watch has now been issued in anticipation of heavy storms tonight with flooding downpours possible.CLICK HERE to track the storms wi